Inspired by Demo 21 from issue 8, Stewart Bullough has come up with an impressive demo of the animation effects possible by rotating
colour registers. The program uses the same technique as Demo 21 of putting all the SIN and COS values in an
array to speed drawing time and the drawing starts from the back and works forward so that 'hidden' lines can be overwritten to create the final effect.
The listing contains REM statements and details the change to make in line 400 if you don't have paddles. The end result is pretty impressive and well worth the time taken to type it in.